Steady-state coherence in multipartite quantum systems: its connection with thermodynamic quantities and impact on quantum thermal machines

• URL: http://arxiv.org/abs/2502.03722v1
• Date: Thu, 06 Feb 2025 02:26:01 GMT
• Title: Steady-state coherence in multipartite quantum systems: its connection with thermodynamic quantities and impact on quantum thermal machines
• Authors: Rui Huang, Q. Y. Cai, Farzam Nosrati, Rosario Lo Franco, Zhong-Xiao Man,
• Abstract summary: We study the unique contributions of quantum coherence among different subsystems of a multipartite system to work and heat currents. Our scheme is versatile, capable of functioning as a refrigerator, an engine, and an accelerator, with its performance being highly sensitive to the configuration settings.
• Score: 4.793664087699155
• License:
• Abstract: Understanding how coherence of quantum systems affects thermodynamic quantities, such as work and heat, is essential for harnessing quantumness effectively in thermal quantum technologies. Here, we study the unique contributions of quantum coherence among different subsystems of a multipartite system, specifically in non-equilibrium steady states, to work and heat currents. Our system comprises two coupled ensembles, each consisting of $N$ particles, interacting with two baths of different temperatures, respectively. The particles in an ensemble interact with their bath either simultaneously or sequentially, leading to non-local dissipation and enabling the decomposition of work and heat currents into local and non-local components.We find that the non-local heat current, as well as both the local and non-local work currents,are linked to the system quantum coherence. We provide explicit expressions of coherence-related quantities that determine the work currents under various intrasystem interactions.Our scheme is versatile, capable of functioning as a refrigerator, an engine, and an accelerator, with its performance being highly sensitive to the configuration settings. These findings establish a connection between thermodynamic quantities and quantum coherence, supplying valuable insights for the design of quantum thermal machines.

Related papers

• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Nonlocal thermoelectric detection of interaction and correlations in edge states [62.997667081978825]
  We propose the nonlocal thermoelectric response as a direct indicator of the presence of interactions, nonthermal states and the effect of correlations. A setup with two controllable quantum point contacts allows thermoelectricity to monitor the interacting system thermalisation.
  arXiv  Detail & Related papers  (2023-07-18T16:28:59Z)
• Efficiency and thermodynamic uncertainty relations of a dynamical quantum heat engine [0.0]
  We show that parameters can be found such that the machine operates both as a quantum engine or refrigerator. We show that parameters can be found such that the machine operates both as a quantum engine or refrigerator, with both sizeable efficiency and small fluctuations.
  arXiv  Detail & Related papers  (2023-03-28T07:30:34Z)
• Spin-chain based quantum thermal machines [1.5293427903448022]
  We study the performance of quantum thermal machines in which the working fluid of the model is represented by a many-body quantum system. A formal characterization of the limit cycles of the set-up is presented in terms of the mixing properties of the quantum channel. For the special case in which the system is a collection of spin 1/2 particles coupled via magnetization preserving Hamiltonians, a full characterization of the possible operational regimes is provided.
  arXiv  Detail & Related papers  (2023-03-27T20:00:02Z)
• Local coherence by thermalized intra-system coupling [0.0]
  Quantum superposition of energy eigenstates can appear autonomously in a single quantum two-level system coupled to a low-temperature thermal bath. We propose a different and more feasible approach employing engineered interactions between two-level systems being thermalized into a global Gibbs state.
  arXiv  Detail & Related papers  (2022-11-16T11:52:33Z)
• Implementation of a two-stroke quantum heat engine with a collisional model [50.591267188664666]
  We put forth a quantum simulation of a stroboscopic two-stroke thermal engine in the IBMQ processor. The system consists of a quantum spin chain connected to two baths at their boundaries, prepared at different temperatures using the variational quantum thermalizer algorithm.
  arXiv  Detail & Related papers  (2022-03-25T16:55:08Z)
• Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction [0.0]
  We study the thermal quantum coherence in a semiconductor double quantum dot. The main goal of this work is to provide a good understanding of the effects of temperature and several parameters in quantum coherence.
  arXiv  Detail & Related papers  (2022-03-12T01:14:26Z)
• Heat transport and cooling performance in a nanomechanical system with local and non local interactions [68.8204255655161]
  We study heat transport through a one dimensional time-dependent nanomechanical system. The system presents different stationary transport regimes depending on the driving frequency, temperature gradients and the degree of locality of the interactions.
  arXiv  Detail & Related papers  (2022-02-21T12:03:54Z)
• Open Quantum Rotors: Connecting Correlations and Physical Currents [0.0]
  We consider a finite one-dimensional chain of quantum rotors interacting with a set of thermal baths at different temperatures. When the interaction between the rotors is made chiral, such a system behaves as an autonomous thermal motor.
  arXiv  Detail & Related papers  (2021-08-24T21:01:50Z)
• Quantum Non-equilibrium Many-Body Spin-Photon Systems [91.3755431537592]
  dissertation concerns the quantum dynamics of strongly-correlated quantum systems in out-of-equilibrium states. Our main results can be summarized in three parts: Signature of Critical Dynamics, Driven Dicke Model as a Test-bed of Ultra-Strong Coupling, and Beyond the Kibble-Zurek Mechanism.
  arXiv  Detail & Related papers  (2020-07-23T19:05:56Z)
• Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production [68.8204255655161]
  An explicit expression for the temperature of an open two-level quantum system is obtained. This temperature coincides with the environment temperature if the system reaches thermal equilibrium with a heat reservoir. We show that within this theoretical framework the total entropy production can be partitioned into two contributions.
  arXiv  Detail & Related papers  (2020-04-09T23:06:43Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.